Moistening attachment for dental-engine handpieces



l. A. BURNETT. MOISTENING ATTACHMENT FOR DENTAL ENGINE HANDPIECES.

A PPLICATION FILED JULY 3' l9l9.

Patented Oct. 14, 1919.

IRA A. BURNETT, OF CHICAGO, ILLINOIS.

MOISTENING ATTACHMENT FOR DENTAL-ENGINE HANDPIEGES.

Application filed July 3, 1919.

To all whom it may concern:

Be it knownthat I, IRA A. BURNETT, a citizen of the United States, residing at the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Moistening Attachments for DentaLEngine Handpieces, of which the following is a specification.

This invention relates to improvements in an attachment for dental hand pieces to be used for moistening or supplying water to the grinders, burs, drills or other tools carried thereby and operated by the engine, and it consists in certain peculiarities of the construction, novel arrangement, combination and operation of the various parts thereof as will be hereinafter more fully set forth and specifically claimed.

The principal object of the invention is to provide an extremely simple and inexpensive moistening attachment for the hand pieces of dental engines, which can be instantly attached thereto or removed therefrom, and of such construction and arrangement of its parts that water in the desired quantities can be supplied in drops or jets (as may be desired), to the grinding disks or stones, burs, drills and the like, for the purpose of keeping the same cool or reducing their temperature.

Another object is to so construct the at- 7 tachment that when applied to the hand piece it will fit the same in such a way as to prevent water from entering the said piece and thereby cause corrosion or rusting of its parts.

Other advantages and objects of the invention will be disclosed in the following description and explanation.

In the accompanying drawing, which serves to illustrate an embodiment of the invention Figure 1 is a view in side elevation of the dental engine hand piece showing my improved moistening attachment therefor mounted in operative position thereon.

Fig. 2 is an enlarged longitudinal sectional view through the attachment showing by dotted lines a fragment orthe front portion of the engine hand pieces located in operative connection with the attachment, and

Fig. 3 is a cross-sectional view taken on line 33 of Fig. 1 looking in the direction indicated by the arrows.

In describing the invention in detail, ref- Specification of Letters Patent.

Patented Oct. 14:, 1919.

Serial No. 308,569.

erence will be had tothe drawings wherein like characters of reference denote like or corresponding parts throughout the several views thereof.

The reference numeral 6 designates the dental hand piece, which may be made of the well known or standard construction, the front end of which is provided with a forwardly tapered and centrally apertured head 7 in which the mandrel or shaft 8 of the tool operated by the engine is located and may be held in the customary manner.

In the present instance the mandrel is shown as being provided with a grinding disk or stone 9, but it will be understood that other kinds of tools, such as burs, drills, and the like may be employed. A sleeve or tubular member 10 is mounted on the front or tapered portion or head 7 of the hand piece, and as is clearly shown in Fig. 2 of the drawing, has near its inner end an an nular and externally disposed flange 11 against which one end of a flexible tube 12 of rubber or other suitable material abuts. This tube or bulb is fitted around the inner ortion oi": the member 10 and is assisted in eing held thereon by means of an external annular flange 13 formed on the inner end of said member. The opposite end of the tube or bulb 12 is provided with an opening 14 to receive the tapered head or front portion 7 of the hand piece. The front portion of the sleeve or tubular member 10 is provided with a transverse partition 15 through an opening in which the mandrel '8 is extended. F orwardly of the partition 15, the sleeve or member 10 is externally screwthreaded to receive an internally screwthreaded cap 16 which has in its front portion a centrally located opening for the man drel or shaft of the tool. Fitted closely on the shaft or mandrel 8 so as to turn therewith is a sleeve or washer 17 of rubber or any other suitable resilient material, the inner end of which is seated on the partition 15 of the member 10 as shown in Fig. 2 of the drawing. This washer or sleeve 17 fits snugly in the front portion of the memlerIlO so as to rotate therein with the man The outer portion of the opening in the sleeve or washer 17 is preferably flared as at 18, see Fig. 2, so as to facilitate the insertion of the mandrel or shaft 8, which after being inserted through the opening in the cap 16, the opening in the washer or sleeve 17, and extended through the partition 15 into the front end of the engine hand piece 6 will be engaged by the chuck carried by said hand piece, which chuck is not shown 5 but may be of the ordinary or usual construction. Thus it will be understood that the inner end of the sleeve or washer 17 will be closely seated and held on the partition 15 of the member 10 so as to prevent the passage of water entering the member 10 rearwardly of said partition and of entering the front portion of the head 7 of thehand piece. To further exclude and prevent water from entering the front end of the hand piece the flexible tube or bulb 12 is employed to closely surround at its rear end the hand piece as well as the inner end of the member 10, which arrangement it is obvious will prevent any water which might pass back- Wardly over the member 10 finding its way into the front portion of the hand piece.

Located longitudinally with respect to the sleeve or member 10 is-a water delivery tube 19, which has its front portion reduced and terminating near the disk or grinder 9, while its other end isextendedrearwardly of the rear end of the member 10 and by preference is provided with an annular enlargement 20 over which is fitted a flexible tube 21 leading to a compressible hand bulb 22 containing water. The rear end of the water delivery tube 19 is by preference provided with a wire extension 23 to fit in the flexible tube 21 so as to support the front portion thereof alongside the hand piece 6, in order to prevent said tube bending near its connection with the water conducting tube 19 and so as to hold said tube in such a position that it will not materially interfere with the hand of the operator in which hand the bulb 22 may be carried.

As shown in Figs. 1 and 2 of the drawing, the water delivery tube 19 is provided with a split collar 24 which surrounds the bulb or sleeve 12 and that portion of the sleeve 10 just rearwardly of the annular flange 11 thereon. This collar isemployed to assist in supporting the water delivery tube 19 on the member 10 and the hand piece 6 and is firmly clamped in place by means of a screw 25 seated in the collar 21 near its split portion.

The water delivery tube 19 is provided near its rear end with a longitudinally extended arm 26 which is provided at its free end with a pair of curved jaws or clamping members 27 which are adapted to stride and clamp the body of the hand piece 6 rearwardly of its head. I

By this arrangement it will be understood that the Water delivery tube 19 will be securely connected to the hand piece and the sleeve or member 10, yet in such a manner that it can be readily detached therefrom when desired.

From the foregoing and by reference to the drawing, it will be readily understood and clearly seen that when the parts are as sembled as shown in Figs. 1 and 2 of the drawing, and as above described, water may be ejected from the bulb 22 through the tube 23 and water delivery tube 19 against the grinder or tool 9 in the desired quantities by simply compressing the bulb which may be carried in the palm of the hand that is used for operating the hand piece, and that by reason of the closures provided by the sleeve 17, the partition 15, and the flexible tube or bulb 12, water will be absolutely prevented entering the hand piece.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is' 1. In a moistening attachment for dental '5 engine hand pieces, the combination with a tubular member adapted to receive the front end of a dental engine hand piece and provided at its front portion with a transversely disposed and apertured partition, of a re- 5 silient sleeve located in said member in front of said partition and seated against the same, said sleeve having a longitudinal opening registering with the opening in said partition, a centrally apertured cap mounted 7 endof a dental engine hand piece and pro- V vided at its front portion with a transversely disposed and apertured partition, of a resilient sleeve located in said member in front of said partition and seated against the same, said sleeve having a longitudinal opening registering with the opening in said partition, a flexible tube located around the. rear portion of said tubular member and having an opening in its rear end to receive and.

clamp said hand piece, a centrally apertured cap mounted on the front end of the tubular member, and means mounted on said tubular member and extended along the same for the discharge of water at its free end near the free. end of said tubular member.

IRA A. BURNETT.

l Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

' Washington, D. G. a 

